A ball is hanging from a cord of negligible weight. A secondary ball with the same weight as the first ball is measured 3m above the hanging ball, and just touching the cord, is released from rest and gains its velocity before striking the hanging ball. If the effect of friction is negligible, and the impact is perfectly elastic, compute the... a) the magnitude of the velocity of the secondary ball in terms of its velocity before contact; b) the direction of the velocity of the secondary ball in terms of its velocity before contact

Classical Dynamics of Particles and Systems
5th Edition
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Stephen T. Thornton, Jerry B. Marion
Chapter2: Newtonian Mechanics-single Particle
Section: Chapter Questions
Problem 2.9P: Consider a projectile fired vertically in a constant gravitauonal field. For the same initial...
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Homework Statement:: A ball is hanging from a cord of negligible weight. A
secondary ball with the same weight as the first ball
is measured 3m above the hanging ball, and just
touching the cord, is released from rest and gains its
velocity before striking the hanging ball. If the effect
of friction is negligible, and the impact is perfectly
elastic, compute the...
a) the magnitude of the velocity of the secondary
ball in terms of its velocity before contact;
b) the direction of the velocity of the secondary ball
in terms of its velocity before contact
V^2=u^2 +2gh
v= sqrt(2x9.81x3)
v=7.67m/s
a) 7.67m/s
cos theta = 1
or theta = 90 degree
b) along 90 degrees with vertical line
however, this computation is for after collision. how can i compute for the
magnitude and direction of the velocity of the secondary ball in terms of its
velocity before contact?
Transcribed Image Text:Homework Statement:: A ball is hanging from a cord of negligible weight. A secondary ball with the same weight as the first ball is measured 3m above the hanging ball, and just touching the cord, is released from rest and gains its velocity before striking the hanging ball. If the effect of friction is negligible, and the impact is perfectly elastic, compute the... a) the magnitude of the velocity of the secondary ball in terms of its velocity before contact; b) the direction of the velocity of the secondary ball in terms of its velocity before contact V^2=u^2 +2gh v= sqrt(2x9.81x3) v=7.67m/s a) 7.67m/s cos theta = 1 or theta = 90 degree b) along 90 degrees with vertical line however, this computation is for after collision. how can i compute for the magnitude and direction of the velocity of the secondary ball in terms of its velocity before contact?
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